Tests FAILING. Lots done: small fixes, new testing module for bigtempo's datasources, etc.
PARTIAL COMMIT (Tests failing, my bad): Lots of small stuff: Deleted old tests; Extracted methods and renamed some of the existing ones; Created temporary files that will be moved to the test data dir as they are validated.
TESTS FIXED! Created sample method for memory profiling; Removed bigtempo's external dependencies; Computing lookback using margin for holydays; Created some TODOs to be done after datasource declaration refactoring; Prepared to compute lookback considering other time frequencies (than DAILY).
Moved testing method to its correct place.
Removed bigtempo's backlog; Refactored cotahist naming;
Updated requirements file.
Removed bigtempo's source, added as a dependency.